GB478831A - Improvements in or relating to tuning controls for wireless receiving sets - Google Patents
Improvements in or relating to tuning controls for wireless receiving setsInfo
- Publication number
- GB478831A GB478831A GB2543536A GB2543536A GB478831A GB 478831 A GB478831 A GB 478831A GB 2543536 A GB2543536 A GB 2543536A GB 2543536 A GB2543536 A GB 2543536A GB 478831 A GB478831 A GB 478831A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuits
- wireless receiving
- circuit
- frequency
- relating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
- H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
478,831. Wireless receiving circuits. GENERAL ELECTRIC CO., Ltd., and BLIGH, N. R. Sept. 18, 1936, No. 25435. [Class 40 (v)] A wireless receiving-set of the kind adapted to receive both on frequencies substantially greater than 30 megacycles (e.g. television frequencies) and substantially less than 30 m.c. (e.g. the normal broadcast range) comprises two electrically separate tuned circuits L1, C1, L<1>1, C<1>1, R1 and L2, C2, L<1>2, C<1>2, R2 the tuning elements C1, C2 of which are unicontrolled, and a switch S by which the circuits are alternatively placed in circuit. By this means the ultra-high-frequency circuit may be wholly and carefully screened as at 13, while merely the inductances L2, L<1>2 of the lower frequency circuit require screening. The triode-hexode frequency changer 1 may be common to the two circuits as shown, or a 'separate valve may be used for each circuit in the latter case the higher frequency valve will be housed within the screen 13. The usual waveband switching arrangements may be additionally provided for the lower frequency unit L2, C2. Specification 454,188 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2543536A GB478831A (en) | 1936-09-18 | 1936-09-18 | Improvements in or relating to tuning controls for wireless receiving sets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2543536A GB478831A (en) | 1936-09-18 | 1936-09-18 | Improvements in or relating to tuning controls for wireless receiving sets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB478831A true GB478831A (en) | 1938-01-26 |
Family
ID=10227619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2543536A Expired GB478831A (en) | 1936-09-18 | 1936-09-18 | Improvements in or relating to tuning controls for wireless receiving sets |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB478831A (en) |
-
1936
- 1936-09-18 GB GB2543536A patent/GB478831A/en not_active Expired
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